Cosmology2026-06-041 minarXiv:2606.06495expressThe Trembling Electron and the Mystery of the Universe's Expansion380,000 years after the Big Bang, the universe had cooled enough for scattered particles to combine into hydrogen atoms.Nanoom Lee·Tianji ZhouHubble's lawFriedmann equationsAdam RiessBrian SchmidtEdwin Hubbleexpansion of the universebig banginflationcosmological constantHubble Space Telescope👍👎☆SimplePopularAdvanced